Electronic LWCO

McDonnell & Miller 153601 model PSE-801-M-120 low water cut-off 120Vac with test switch and standard probe for steam boilers. Learn More

Hydrolevel Safgard 550P 120 volt low water cut off with long nut, manual reset, burner circuit test button, and LED indicating lights for hot water boilers. Learn More

McDonnell & Miller model number 750T-120 is an electronic low water cut-off control unit for use on hot water boilers and as secondary protection on steam boilers. This cut-off unit is 120 volt and features an automatic reset, test switch, and LED low water indicator light. It is for use with McDonnell & Miller remote sensors (SKUs MI1550 and MI1551). Learn More

McDonnell & Miller model number 750MT-120 is an electronic low water cut-off control unit for use on hot water boilers and as secondary protection on steam boilers. This cut-off unit is 120 volt and features a manual reset, test switch, and LED low water indicator light. It is for use with McDonnell & Miller remote sensors (SKUs MI1550 and MI1551). Learn More

McDonnell & Miller model number 751P-MT-120 is an electronic low water cut-off control unit, with built-in PA-800 probe, for use on hot water boilers and as secondary protection on steam boilers. This cut-off unit is 120 volt and features a manual reset and test switch. Learn More

McDonnell & Miller model number 751P-MT-U-120 is an electronic low water cut-off control unit, with built-in PA-800U probe, for use on hot water boilers and as secondary protection on steam boilers. This cut-off unit is 120 volt and features a manual reset and test switch. Learn More

McDonnell & Miller Series 751P 120V probe-type low water cut-off with short probe that provides protection against low water conditions for commercial and industrial applications. Learn More

McDonnell & Miller Series 751P 24V probe-type low water cut-off with standard probe that provides protection against low water conditions for commercial and industrial applications. Learn More

McDonnell & Miller Series 751P 24V probe-type low water cut-off with short probe that provides protection against low water conditions for commercial and industrial applications. Learn More

McDonnell & Miller model number PS-801-M-U-24 is an electronic low water cut-off control unit, with extended barrel probe, for use on steam boilers. This cut-off unit is 120 volt and features a manual reset, test switch, and LED low water indicator light. Its maximum water temperature is 250°F and pressure is 15 psi. It is a compact unit with 3/4" MIP connections and a 2-1/8" probe. Learn More

McDonnell & Miller model number PSE-802M-24 is an electronic low water cut-off control unit, with probe, for use on steam boilers. This cut-off unit is 24 volt and features a manual reset, test switch, and LED low water indicator light. Its maximum water temperature is 250°F and pressure is 15 psi. It is a compact unit with 3/4" MIP connections and a 2-1/8" probe. Learn More

McDonnell & Miller model number PS-802-M-U-24 is an electronic low water cut-off control unit, with extended barrel probe, for use on steam boilers. This cut-off unit is 24 volt and features a manual reset, test switch, and LED low water indicator light. Its maximum water temperature is 250°F and pressure is 15 psi. It is a compact unit with 3/4" MIP connections and a 2-1/8" probe. Learn More

Hydrolevel Safguard model 550SV low water cut-off with manual reset, test button, and short probe. This unit interrupts power in a low water condition. The burner circuit locks-out if water remains below probe for 30 seconds. A test button checks burner circuit to ensure proper control operation and lock-out function without lowering the water level. Learn More

Hydrolevel Safguard model 650SV low water cut-off with automatic reset, test button, and short probe. This unit interrupts power immediately in a low water condition. The burner circuit locks-out if water remains below probe for 30 seconds. A test button checks burner circuit to ensure proper control operation without lowering the water level. Learn More

Hydrolevel Safguard model 550 low water cut-off with manual reset and test button. This unit interrupts power in a low water condition. The burner circuit locks-out if water remains below probe for 30 seconds. A test button checks burner circuit to ensure proper control operation and lock-out function without lowering the water level. Learn More

Hydrolevel Safguard model 650 low water cut-off with automatic reset and test button. This unit interrupts power immediately in a low water condition. The burner circuit locks-out if water remains below probe for 30 seconds. A test button checks burner circuit to ensure proper control operation without lowering the water level. Learn More

Hydrolevel Safguard model 170 low water cut-off for 160 psi. This LWCO is 120 VAC, has a switching capacity of 5.8 FLA and 34.8 LRA, and has SPDT switch contacts. The 170 Series interrupts power immediately in a low water condition and automatically restarts the burner on return of normal water level. Learn More

Hydrolevel Safguard model 170SV low water cut-off with short probe for 160 psi. This LWCO is 120 VAC, has a switching capacity of 5.8 FLA and 34.8 LRA, and has SPDT switch contacts. The 170 Series interrupts power immediately in a low water condition and automatically restarts the burner on return of normal water level. Learn More

Hydrolevel Safgard 500 24 volt low water cut off with a manual reset, burner circuit test button, and LED indicating lights for hot water boilers. Learn More

Hydrolevel Safgard 400 24 volt low water cut off with 15-second burner off delay, 30-second burner on delay, automatic rest, and low water indicating light for steam boilers. Learn More